coming or resulting from a natural impulse or tendency; without effort or premeditation; natural and unconstrained; unplanned:
a spontaneous burst of applause.
(of a person) given to acting upon sudden impulses.
(of natural phenomena) arising from internal forces or causes; independent of external agencies; self-acting.
growing naturally or without cultivation, as plants and fruits; indigenous.
produced by natural process.
occurring, produced, or performed through natural processes without external influence: spontaneous movement
arising from an unforced personal impulse; voluntary; unpremeditated: a spontaneous comment
(of plants) growing naturally; indigenous
- Spontaneous pneumothorax
spontaneous pneumothorax n. A pneumothorax occurring secondary to parenchymal lung disease.
- Spontaneous recovery
noun 1. (psychol) the reappearance of a response after its extinction has been followed by a period of rest
- Spontaneous version
spontaneous version n. A turning of the fetus occurring as a result of the unaided contraction of the uterine muscle.
noun 1. a shafted weapon having a pointed blade with crossbar at its base, used by infantry officers in the 17th and 18th centuries. noun 1. a form of halberd carried by some junior infantry officers in the 18th and 19th centuries